Numerical Study on the Expansion and Variation of Changjiang Diluted Water in Summer and Autumn

In view of the expansion and directional change mechanisms Yangtze River water diluted with sea in shelf region (also known as Changjiang [CDW]) during summer autumn, a three-dimensional hydrodynamic model Estuary (YRE) its adjacent waters was established based on Finite Volume Community Ocean Model (FVCOM). Compared measured data, accurately simulates characteristics YRE. On that basis, influence patterns CDW both autumn studied. It found that, 2019, expanded to northeast southeast route is mainly controlled by wind, not runoff. Current seasonal winds also transportation affecting field. Typhoons are frequent causing abnormalities CDW. During typhoon, large amount transported continuous abnormal manner, accelerating path turning This paper enhances existing theoretical research provides reference respect all over world.